Preparation method of 3D printing wire material of solid electrolyte
A solid-state electrolyte and 3D printing technology, which is applied in the preparation of lithium-ion solid-state electrolytes and the preparation of lithium-ion solid-state electrolyte 3D printing filaments. The process is cumbersome and other problems, so as to reduce the risk of chemical reagent poisoning and improve the effect of preparation efficiency
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[0013] A preparation method of solid electrolyte 3D printing filament, which is characterized in that it comprises the following steps:
[0014] Step 1. The composition of the precursor material for the 3D printing filament is: lithium trifluoromethanesulfonimide, polyethylene oxide with a molecular weight of 300,000, and vinylidene fluoride-hexafluoropropylene copolymer, all of which are For powdered materials, the mass ratio is 5:13-16:3-6;
[0015] Step 2: Preparation of 3D printing filament precursor material. Place the weighed polyethylene oxide powder with a molecular weight of 300,000 in an open beaker, and then add the weighed vinylidene fluoride-hexafluoropropylene copolymer powder , Use a blender to stir and mix the two evenly for ten minutes; again weigh the bistrifluoromethanesulfonimide lithium powder into the same open beaker, then add absolute ethanol, the ratio of absolute ethanol to the powder mixture 5ml / g~6ml / g, use a blender to continue stirring for 20 minutes ...
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[0030] Examples:
[0031] (1) Precursor preparation
[0032] The solid electrolyte precursor includes 3 material components, lithium trifluoromethylsulfonimide, polyethylene oxide with a molecular weight of 300,000, vinylidene fluoride-hexafluoropropylene copolymer, and bistrifluoromethylsulfonyl Lithium imide is a conductive lithium salt, polyethylene oxide is a polymer electrolyte, and vinylidene fluoride-hexafluoropropylene copolymer is a reinforcing material. The three materials are all powder materials. The three materials are fully mixed through mechanical mixing. , Forming a powdery mixture, the mass ratio of lithium salt, polyethylene oxide and vinylidene fluoride-hexafluoropropylene is 5 / 15 / 4. The specific steps are as follows: weigh the polyethylene oxide powder and place it in an open beaker, then add the weighed vinylidene fluoride-hexafluoropropylene copolymer powder, stir with a mixer, and mix the two uniformly for ten minutes. Weigh again the lithium bistrifluorome...
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